BAG FILTER EFFICIENCY : FILTER EFFICIENCY

BAG FILTER EFFICIENCY : BIOLOGICAL FILTER AQUARIUM : NETBOOK PRIVACY FILTER.

Bag Filter Efficiency


bag filter efficiency
    filter efficiency
  • The efficiency of various filters can be established on the basis of entrapped particles; i.e., collection efficiency; or on the basis of particles passed through the filter; i.e., penetration efficiency.
  • The operating results from a filter as measured by various criteria such as percentage reduction in suspended matter, total solids, biochemical oxygen demand, bacteria, color.
  • method of expressing a filter's ability to trap and retain contaminants of a given size.
    bag
  • (of a hunter) Succeed in killing or catching an animal
  • Succeed in securing (something)
  • a flexible container with a single opening; "he stuffed his laundry into a large bag"
  • capture or kill, as in hunting; "bag a few pheasants"
  • Put (something) in a bag
  • hang loosely, like an empty bag

Aquacat 2004 Yellow sponge
Aquacat 2004 Yellow sponge
The sponges or poriferans' (from Latin porus "pore" and ferre "to bear") are animals of the phylum Porifera. Their bodies consist of jelly-like mesohyl sandwiched between two thin layers of cells. While all animals have unspecialized cells that can transform into specialized cells, sponges are unique in having some specialized cells that can transform into other types, often migrating between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes, and the shapes of their bodies are adapted to maximize the efficiency of the water flow. All are sessile aquatic animals and, although there are freshwater species, the great majority are marine (salt water) species, ranging from tidal zones to depths exceeding 8,800 metres (5.5 mi). While most of the approximately 9,000 known species feed on bacteria and other food particles in the water, some host photosynthesizing micro-organisms as endosymbionts and these alliances often produce more food and oxygen than they consume. A few species of sponge that live in food-poor environments have become carnivores that prey mainly on small crustaceans. Sponges are known for regenerating from fragments that are broken off, although this only works if the fragments include the right types of cells. A few species reproduce by budding. When conditions deteriorate, for example as temperatures drop, many freshwater species and a few marine ones produce gemmules, "survival pods" of unspecialized cells that remain dormant until conditions improve and then either form completely new sponges or re-colonize the skeletons of their parents. However most sponges use sexual reproduction, releasing sperm cells into the water. In viviparous species the cells that capture most of the adults' food capture the sperm cells but, instead of digesting them, transport them to ova in the parent's mesohyl. The fertilized eggs begin development within the parent and the larvae are released to swim off in search of places to settle. In oviparous species both sperm and egg cells are released into the water and fertilisation and development take place outside the parent's bodies. Sponges use various materials to reinforce their mesohyl and in some cases to produce skeletons, and this forms the main basis for classifying sponges. Calcareous sponges produce spicules made of calcium carbonate. Demosponges reinforce the mesohyl with fibers of a special form of collagen called spongin, most also produce spicules of silica, and a few secrete massive external frameworks of calcium carbonate. Although glass sponges also produce spicules made of silica, their bodies mainly consist of syncytia that in some ways behave like many cells sharing a single external membrane, and in others like individual cells with multiple nuclei. Probably because of their variety of construction methods, demosponges constitute about 90% of all known species, including all freshwater ones, and have the widest range of habitats. Calcareous sponges are restricted to relatively shallow marine waters where production of calcium carbonate is easiest. The fragile glass sponges are restricted to polar regions and the ocean depths where predators are rare, and their feeding systems very efficiently harvest what little food is available. Fossils of all of these types have been found in rocks dated from 580 to 523 million years ago. In addition Archaeocyathids, whose fossils are common in rocks from 530 million years ago but not after 490 million years ago, are now regarded as a type of sponge. It is generally thought that sponges' closest single-celled relatives are choanoflagellates, which strongly resemble the cells that sponges use to drive their water flow systems and capture most of their food. It is also generally agreed that sponges do not form a monophyletic group, in other words do not include all and only the descendants of a common ancestor, because it is thought that Eumetazoa (more complex animals) are descendants of a sub-group of sponges. However it is uncertain which group of sponges is closest to Eumetazoa, as both calcareous sponges and a sub-group of demosponges called Homoscleromorpha have been nominated by different researchers. In addition a study in 2008 suggested that the earliest animals may have been similar to modern comb jellies. Since comb jellies are considerably more complex than sponges, this would imply that sponges had mobile ancestors and greatly simplified their bodies as they adapted to a sessile filter feeding lifestyle. Chancelloriids, sessile, bag-like organisms whose fossils are found only in rocks from the Cambrian period, increase the uncertainty as it has been suggested that they were sponges but also that their external spines resemble the "chain mail" of the slug-like Halkierii
SSA50035
SSA50035
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bag filter efficiency
See also:
large aquarium filter
high order low pass filter
champion oil filter motorcycle
pond filter uv light
ice machine water filter
50 hz low pass filter
wet dry filter systems
flanders filters hepa
sigma uv filter
find oil filter
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